Alert archive / Texas / Flash Flood Warnings in 2011
Flash Flood Warning 4, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Sep 22, 2011, 6:22 PM CDT for Val Verde County, Texas. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 22, 2011, 6:22 PM CDT (23:22 UTC)
- Expired
- Sep 23, 2011, 12:30 AM CDT
- In force
- 6 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
County Val Verde County, TX
The radar
The Laughlin AFB radar (KDFX), 60 km from the middle of the area, began a volume at 23:26 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Del Rio, TX (KDRT), launched 12:00Z, 11.4 hours before the alert went out and 9 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 565 J/kg
- Mixed-layer CIN
- -245 J/kg
- Mixed-layer LCL
- 1252 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -44 m²/s²
- 0-3 km storm-relative helicity
- 118 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
707
WGUS54 KEWX 222322
FFWEWX
TXC465-230530-
/O.NEW.KEWX.FF.W.0004.110922T2322Z-110923T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
622 PM CDT THU SEP 22 2011
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
VAL VERDE COUNTY...
* UNTIL 1230 AM CDT.
* AT 620 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
DETERMINED THAT RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE SLOW
MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL FROM CARTA VALLEY TO
TO THE ROUGH CANYON RECREATION AREA TO 10 MILES NORTHEAST OF
LAUGHLIN AFB. RAINFALL AMOUNTS OF 3 TO 5 INCHES HAVE BEEN
ESTIMATED BY RADAR. ADDITIONAL RAINFALL OF 2 TO 4 INCHES IS
POSSIBLE.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...DEL
RIO AND LAUGHLIN AFB.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...
DEVILS RIVER...RED BLUFF CREEK...WEST FORK SYCAMORE CREEK...GRANDE,
RIO...SYCAMORE CREEK...SAN FELIPE CREEK...EAST FORK SYCAMORE CREEK...
CALAVERAS CREEK...CIENEGAS CREEK...SALT CREEK AND MCKEES CREEK.
WHEN WATER COVERS THE ROAD...TURN AROUND DON'T DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.
&&
LAT...LON 2948 10097 2980 10081 2981 10070 2935 10072
2933 10075 2927 10075 2924 10081 2934 10096
2936 10102 2944 10105
$$2 follow-up statements
531
WGUS74 KEWX 230015
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
715 PM CDT THU SEP 22 2011
TXC465-230530-
/O.CON.KEWX.FF.W.0004.000000T0000Z-110923T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
VAL VERDE TX-
715 PM CDT THU SEP 22 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT FOR VAL
VERDE COUNTY...
AT 706 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT THUNDERSTORMS PRODUCING FLASH FLOODING FROM AMISTAD DAM TO
DEL RIO TO LAUGHLIN AFG. THESE STORMS ARE MOVING SOUTH AT 20 MPH.
RADAR ESTIMATES INDICATE RAINFALL AMOUNTS UP TO 6 INCHES HAVE FALLEN
SOUTHWEST OF CARTA VALLEY ALONG HIGHWAY 377 WITH AMOUNTS UP TO 3
INCHES FURTHER SOUTHWEST ALONG HIGHWAY 377/277 TOWARD DEL RIO.
ADDITIONAL RAINFALL AMOUNTS UP TO 2 INCHES ARE POSSIBLE WITH THESE
THUNDERSTORMS OVER AREAS IN AND AROUND DEL RIO AND LAUGHLIN AFB.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...
DEVILS RIVER...RED BLUFF CREEK...WEST FORK SYCAMORE CREEK...GRANDE,
RIO...SYCAMORE CREEK...SAN FELIPE CREEK...CALAVERAS CREEK...CIENEGAS
CREEK...SALT CREEK AND MCKEES CREEK.
&&
LAT...LON 2948 10097 2980 10081 2981 10070 2935 10072
2933 10075 2927 10075 2924 10081 2934 10096
2936 10102 2944 10105
$$664
WGUS74 KEWX 230215
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
915 PM CDT THU SEP 22 2011
TXC465-230530-
/O.CON.KEWX.FF.W.0004.000000T0000Z-110923T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
VAL VERDE TX-
915 PM CDT THU SEP 22 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT FOR VAL
VERDE COUNTY...
AT 910 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
ONLY PATCHES OF LIGHT RAIN ACROSS VAL VERDE COUNTY. ONLY LIGHT RAIN
IS STILL EXPECTED TO CONTINUE. HOWEVER...FLOODING IS EXPECTED ON
SOME STREAMS DUE TO EARLIER HEAVY RAINFALL OF UP TO 6 INCHES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...
DEVILS RIVER...RED BLUFF CREEK...WEST FORK SYCAMORE CREEK...GRANDE,
RIO...SYCAMORE CREEK...SAN FELIPE CREEK...CALAVERAS CREEK...CIENEGAS
CREEK...SALT CREEK AND MCKEES CREEK.
IT IS HARD TO RECOGNIZE THE DANGERS OF FLOODING AT NIGHT. IF FLOOD
WATERS RISE ACT QUICKLY. DO NOT STAY IN FLOOD PRONE AREAS.
&&
LAT...LON 2948 10097 2980 10081 2981 10070 2935 10072
2933 10075 2927 10075 2924 10081 2934 10096
2936 10102 2944 10105
$$The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 21, 7:10 PM CDT | Areal Flood Advisory | EWX | Bandera, Edwards, Gillespie, Kerr, Real | 110 min |
| Sep 21, 8:40 PM CDT | Areal Flood Advisory | EWX | Bandera, Edwards, Gillespie, Kendall, Kerr, Medina and 2 more | 3 hr |
| Sep 22, 5:50 PM CDT | Areal Flood Advisory | EWX | Edwards, Kinney, Val Verde | 2 hr |
| Sep 22, 6:11 PM CDT | Severe Thunderstorm Warning | EWX | Kinney, Val Verde | 34 min |
| Sep 22, 6:42 PM CDT | Severe Thunderstorm Warning | EWX | Kinney, Val Verde | 48 min |
Nearby
Flash Flood Warnings in Texas, 2011Every flash flood warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.